Table 3. Particle Range Particulate Weight Concentration Concentration (aCi/m3) Concentration (pCi/g) 0.440 19.3 30 1.6 29 1.55 0.083 1.50 3.3-7 0.169 7.4 18 0.6 18 2.43 0.081 2.43 2.0-3.3 0.097 4.3 16 <0.5 16 3.76 <0.2 3.76 1.1-2.0 0.102 4.5 12 <0.5 11 2.68 <0.2 2.46 0.445 19.5 0.23 <O.1 0.18 (um) > 7 Gel Uranium Concentrations on Each Stage of the Cascade Impactor < 1.1 (g) (ug/m3) 234y 4.5 235y <0.5 238y 3.5 234 yy 2351 238y